printf "%1.20f\n", int(10.1) ;
printf "%1.20f\n", 10 ;
printf "%1.20f\n", 012 ;
printf "%1.20f\n", "10" ;
printf "%1.20f\n", 1e1 ;
printf "%1.20f\n", 10.100 ;
printf "%1.20f\n", 10.1 ;
printf "%1.20f\n", '10.1' ;
printf "%1.20f\n", 10.1000000000 ;
printf "%1.20f\n", 10.1000000001 ;